Technical Manual Hitachi ZW250-6 Wheel Loader | TONEM50-EN-01

Technical Manual Hitachi ZW250-6 Wheel Loader TONEM50-EN-01 (Preview)

TONEM50-EN-01
CONTENTS
INTRODUCTION
SYMBOL AND ABBREVIATION
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
Group 1 Specifications
Specifications
Weight of Main Components
Group 2 Component Layout
Main Component (Overview)
Main Component
Electrical System (Overview)
Air Cleaner / Radiator Assembly
Battery Box
Hydraulic Oil Tank
Fuel Tank
Drive Unit
Front Axle
Cab
Engine
Aftertreatment Device
Fan Valve
Pump Device
Multiple Control Valve
Manifold Valve
Parking Brake Solenoid Valve
Brake Charge Valve
2-Spool Solenoid Valve Unit
Steering Valve Block
Emergency Steering Pump
Flow Regulator Valve
DEF Tank
DEF Supply Module
Joystick Steering Hydraulic Component Layout
Joystick Steering Cab Components
Group 3 Component Specifications
Engine
Engine Accessories
Hydraulic Component
Electrical Component
SECTION 2 SYSTEM
Group 1 Controller
Outline
CAN Circuit
Group 2 Control System
Outline
Engine Control (ECM)
Pump Control
Transmission Control (TCU)
Fan Control, Valve Control
Other Controls
Control by Electrical and Hydraulic Combined Circuit
JSS Control System
Group 3 Engine System
Outline
ECM System
Fuel Injection Control
Fuel Injection Volume Correction Control
EGR Control
Preheating Control
Variable Turbocharger Control
Alarm Control
Urea SCR System
Engine Output Restriction Control (INDUCEMENT)
Aftertreatment Device
Aftertreatment Device Regeneration Control
Group 4 Hydraulic System
Outline
Pilot Circuit
Main Circuit
Steering Control Circuit
Front Attachment Control Circuit
Fan Circuit
Emergency (Secondary) Steering Circuit
Joystick Steering Hydraulic System
Group 5 Electrical System
Outline
Main Circuit
Electric Power Circuit (Key Switch: OFF)
CAN Circuit
Accessory Circuit (Key Switch: ACC)
Starting Circuit (Key Switch: START)
Neutral Engine Start Circuit
Charging Circuit (Key Switch: ON)
Surge Voltage Prevention Circuit
Pilot Shut-Off Circuit (Key Switch: ON)
Auto Shut-Down (Idling Stop) Circuit
Engine Stop Circuit
Monitor Circuit
Steering Column Monitor Circuit
Head Light Circuit
Hazard Light Circuit (Key Switch: OFF)
Turn Signal Light Circuit
Horn Circuit (Key Switch: OFF)
Reverse Light/Buzzer Circuit
Brake Light Circuit
Parking Brake Circuit
Accessory Circuit
Work Light Circuit
Wiper Circuit
Cab Dome Light Circuit
JSS Electrical System
Outline
Joystick Steering Electrical Circuit
Forward/Reverse Switch Electrical Circuit
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Hydraulic Pump Outline
Main Hydraulic Pump
Regulator
Steering Priority Valve
Steering Main Relief Valve
Pilot Pump
Pump Delivery Pressure Sensor
Group 2 Control Valve
Outline
Hydraulic Circuit
Main Relief Valve
Overload Relief Valve (with Make-Up Function)
Anti-Drift Valve
Lift Arm Flow Rate Control Valve
Charge-Cut Valve in Ride Control Spool
Drain Plug
Pump Flow Rate Control Valve
Group 3 Cooling Fan System
Fan Pump
Fan Motor
Fan Control Valve
Group 4 Steering Pilot Valve
Outline
Structure
Operation
Group 5 Steering Valve
Outline
Operation
Steering Overload Relief Valve
Outline (Fingertip Control Type Pilot Valve for Front Attachment)
Group 6 Pilot Valve
Operation
Electromagnetic Detent
Outline (Joystick Type Pilot Valve for Front Attachment)
Operation
Electromagnetic Detent
Group 7 Brake Charge Valve / Manifold Valve
Outline
Brake Charge Valve
Manifold Valve
Pilot Relief Valve
Torque Control Solenoid Valve
Control Lever Lock Solenoid Valve
Service Brake Accumulator
Pilot Accumulator
Group 8 Drive Unit
Outline
Torque Converter
Transmission
Operation of Transmission
Transmission Control Valve
Drive Unit Circuit
Parking Brake Manual Release
Group 9 Axle
Outline
Differential
Torque Proportioning Differential (TPD)
Limited Slip Differential (LSD) (Option)
Service Brake
Final Drive Planetary / Axle Shaft
Group 10 Brake Valve
Outline
Operation
Group 11 Others
Propeller Shaft
2-Spool Solenoid Valve Unit
Parking Brake Solenoid Valve Unit
Parking Brake Solenoid Valve
Parking Brake Accumulator
Flow Regulator Valve
Steering Accumulator
Ride Control Accumulator
Torque Converter Cooler Check Valve
Stop Valve
Pilot Oil Filter
Emergency (Secondary) Steering Check Block
Emergency (Secondary) Steering Pump
Joystick Steering Control Valve
SERVICE MANUAL REVISION REQUEST FORM